Neil deGrasse Tyson didn't mean to get Pluto demoted from planet status; he just wanted people to think about the solar system differently. But changing the number of planets from nine to eight is just what happened when a debate sparked by the astrophysicist's Hayden Planetarium exhibit—sans Pluto—ended with the re-categorization of the icy rock to dwarf planet
status. Dr. Tyson tells his story—and the story of Pluto—in his new book The Pluto Files: The Rise and Fall of America's Favorite Planet.
He talks with host Steve Curwood.
Read the transcript
